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UNITED STATES PATENT OFFICE.

LEON FAVRE, OF NEW' YORK, N. Y.

PROCESS OF DECORATING WATCHES.

SPECIFICATION forming part of Letters Patent No. 415,100, dated November12, 1889.

' Application filed December 5, 1887. Serial No. 257,053. (Nospecimens.)

T0 ctZZ whom it may concern.-

Be it known that I, LEON FAVRE, a native of Switzerland, residing at No.236 \Vest Fortyfourth street, New York, in the county of New York andState of New York, have invented certain new and useful Improvements inDecorating Watches and other Jewelry Made of Gold or other Metals, ofwhich the following is a description.

This invention relates to a process for applying pictures orrepresentations to metal, as set forth in the following specificationand claim. The process is serviceable in reproducing photographs,engravings, and paintin gs upon metal.

In carrying out the process I prepare a negative of the image orrepresentation to be produced-that is to say, what appears in theoriginal as the right-hand side must appear in the negative as theleft-hand side, and vice versa, so that when the image or representationis finally applied to the metal surface the parts of the image orrepresentation will be again in their'proper position to correspond tothe original. When the negative is finished and properly touched up, Itake carbon-paper and sensitize it in any suitable well-known way, as bymeans of a suitable sensitizing preparation, such as bichromate ofpotash. The paper when sensitized is dried in a dark place or room. Thedry paper is applied to the negative, and the whole is exposed to thelight in a photographic press, so that the light shining through thenegative will produce a photograph or reproduction of the latter uponthe sensitized paper. By means of a photometer it can be ascertained ifa good proof has been obtained. A plate or piece of polished metalsuch,for example, as gold-is then treated with pumice-stone and water appliedby means of a brush until the polish is dimmed. The dimming is confinedto the place where the representation is to be applied, which isgenerally the center of the plate, and care is taken to have the dimmingas regular as possible and provided with a soft finish; or, if desired,a dim gilding or dim silvering can be applied to a metalplate, thus alsoproducing an eifect as pleasing as the dimming by means of pumice-stone.WVhen the surface is sufficiently dimmed, I cover it with a layer ofcollodion, and

then dip the metal surface or plate in cold.

water for about five .rninutes. The carbonpaper proof or print is thenalso dipped into the same bath, and is then applied to the metal surfacewhich has been treated with 001- The carbon-paper is thus dissolved orwashed away, leaving the representation on the collodion-filin adheringto the metal. I continue the treatment with warm water until all foreignmatter has disappeared from the plate, when there remains a perfectrepresentation on themetal surface. I then wash with cold water andleave the representation and plate to become dry. To fix therepresentation upon the metal surface, a coating of collodion or varnishis applied, which is dried and hardened at a temperature of about 100centigrade.

My invention will be found very useful in decorating gold watch-cases;but I do not restrict myself to this single use of my invention.

What I claim as new, and desire to secure by Letters Patent, is

The process of applying carbon prints to metallic surfaces, whichconsists in dimming the surface of the metal, applying to the metalsurface an adhesivesuch as collodionapplying the carbon print to theadhesive, and Washing off or removing the carbonpaper and foreignmatter, so as to leave the print adhering to the metal, substantially asdescribed.

LEON FAVRE. Witnesses:

. STEPHEN E. FoLAN,

GEORGES RIZARD.

